ES2758999T3 - Rope with core and sleeve - Google Patents

Abstract

Rope with core and jacket (1), comprising a textile core (2) with several fixed threads (21-28) that run completely in the longitudinal direction of the rope, an external jacket (3) that is in the form of a hollow braid and an inner jacket (4) surrounding the core (2), which is in the form of a hollow braid, characterized in that a part of the fixed core strands (21-26) is individually braided in the hollow braid (41, 42) of the inner sleeve (4) and because a part of the fixed threads (27, 28) of the core (2) is in the center of the core without union with each other, as well as without being braided in the sleeve internal.

Description

DESCRIPTION

Rope with core and sleeve

The present invention relates to a core-jacketed rope, comprising a textile core with one or more fixed threads running in the longitudinal direction, an outer jacket in the form of a hollow braid, and an inner jacket surrounding the core, which is in the form of a hollow braid.

Core and jacketed cords are known and are described, for example, in documents AT 358,433B, WO 2003/27383 A, WO 2005/085518 A, DE 4035814 A1, US 4,312,260 A and DE 4038161 A.

Poor bonding between the core and jacket is problematic on existing core and jacket cords. In particular, during the use of the rope a relative displacement of the core and the jacket may appear. This displacement leads to annoying thick spots, poor transmission of force from the jacket to the core, and overload on the jacket, which can lead to jacket tear. There are different solution approaches, to prevent this displacement with core and sleeve:

One possibility is to use an adhesive or adhesive tape (see, for example, DE 4038161 A or GB 891.741). However, the adhesion is not permanently permanent, in addition it prevents any relative movement between the core and the jacket, therefore it leads to a stiffening of the cords and with it a worse knotting capacity.

It is further known to bring the core and jacket into closer contact with each other by joining core wires with jacket wires or by additional transverse wires (see eg WO 2003 / 27383A, WO 2005 / 088518A) .

Braids are described in documents EP 2 239 359 A1, DE 10 2007 063 052 A1, DE 131208 C and DE 223466 C, in which due to the corresponding arrangement of the braiding bobbins wire changes are foreseen in the sense that Threads from the outer zone of the rope (eg, an outer jacket) are changed to the inner zone (eg, an inner jacket) and vice versa. Likewise, according to these documents, entanglement between external and internal threads can be provided.

EP 2063018 describes a rope element with a core of silicone material, which is surrounded by a textile jacket. From WO 2006/055995 it is known to provide the individual elements of a cord with a reinforcement. Additional state of the art is disclosed in FR 334,887, US 2,600,395 A, DE 2541763 A and US 4,192,127 A.

There continues to be a need for core and jacketed cords with satisfactory wear properties, particularly with regard to the stability of the core and jacket bond throughout the useful path of the cord.

To this it must be added that in the core and jacketed ropes, whose core is made up of several threads that run in the longitudinal direction, this core has a reduced stability. If the jacket is imaginatively removed, then the core breaks down into its individual strands running in the longitudinal direction. Accordingly, a transmission of jacket force to all core-forming yarns can only take place insufficiently, and not all core-forming yarns are used to the same extent to absorb a load.

The present invention provides a core-jacketed rope according to claim 1.

Brief description of the figures:

Figure 1 schematically shows the structure of a preferred embodiment of a core-jacketed rope according to the invention as well as its production.

Figures 2 to 7 schematically show alternative wire change or interlace configurations.

Detailed description of the invention:

For the purposes of the present invention, the term "threads" is to be understood as the thread-like components of a rope such as, for example, twisted threads or braided elements. In this regard, a thread may be comprised of several contiguous elements, such as, for example, several contiguous twisted threads, the contiguous elements carrying the entire length of the rope.

The term "fixed threads" is used to refer to threads which, unlike the inner and outer jacket threads, run entirely in the longitudinal direction of the rope.

According to the invention, at least a part of the fixed core threads running in the longitudinal direction of the rope are individually braided in the hollow braid of the inner jacket. As explained above, the term "thread" in this regard also includes a plurality of string elements contiguous, such as, for example, a bundle of several contiguous twisted strands that come from a single hole.

Therefore, unlike the proposals, in which all the core fixed threads are jointly covered by the jacket or on the other hand, individual fixed threads have a reinforcement, but are not joined together, according to the invention, core core threads are braided into the hollow braid of the inner shirt. In this way, a better union and integration of the core with the inner jacket is produced.

According to the invention, a part of the core core strands is not individually braided in the hollow braid of the inner jacket.

According to the invention, the individually unbraided fixed wires in the hollow braid of the inner jacket are arranged in the center of the core.

That is, therefore, fixed core strands are without bonding to each other, as well as without being braided in the inner jacket, in the center of the core, while additional threads are braided in the hollow braiding of the inner jacket.

In a preferred embodiment of the rope according to the invention, at certain points yarn changes are provided between inner jacket yarns and outer jacket yarns and / or interlacing between inner jacket yarns and outer jacket yarns.

In this variant of the present invention, it is especially preferable that bridge threads running in the longitudinal direction of the chord, around which the threads of the outer jacket or the inner shirt that change from inside to outside or from outside to inside.

Starting from the yarn changes described in the documents cited above between the outer jacket and inner jacket yarns as well as the interlacing between the outer jacket and inner jacket threads, in this preferred embodiment of the invention at these points For wire change or interlacing, additional fixed wires (bridge wires) are provided which run in the longitudinal direction.

In this regard, the following possibilities are conceivable:

- A change of the thread of the outer jacket to the inner jacket and vice versa, the guided wire from inside to outside and the guide from outside to inside being guided around the bridge wire.

- An inner jacket thread and an outer jacket thread are guided around each other, but then continue to be guided again in the original position, that is, the internal jacket thread continues to be guided in the internal jacket and so analog the outer jacket thread back into the outer jacket. The bridge yarn is in this case between the inner jacket and the outer jacket yarn and is interwoven by at least one of the yarns. Although in this variant the inner jacket yarn and the outer jacket yarn are not directly entangled with each other, but through the bridge yarn, this embodiment for the purposes of the present invention is called "interlocking".

- An intertwining and a change of thread, that is to say a thread of the inner jacket and a thread of the outer jacket are guided around each other as described above, however they additionally change the position, that is to say the thread of the jacket internal continues to be guided in the external shirt and vice versa. The bridge wire is in this case between the inner jacket and outer jacket wire and is interwoven by both wires. Preferably, the bridge wires are intertwined by the inner jacket wires and the outer jacket wires.

However, in all cases the provided bridge wires are surrounded by both the outer jacket wires and the inner jacket wires and therefore form a bridge between the outer jacket and the inner jacket. At the same time, the bridge yarn (load bearing) remains in the pulling direction, so that it contributes to the breaking load of the rope, which is primarily determined by the yarns in the pulling direction. Naturally, the inner jacket wires and the outer jacket wires can also be guided several times around the jumper wire and then either continue to be guided in their original position or change the position from outside to inside and vice versa.

Preferably, the bridge wires are made of the same material as the core core wires.

In a further preferred embodiment, the core-jacketed rope according to the invention has yarns with different properties.

In this regard, properties such as color, title, fiber type (for example monofilament, staple fiber, multifilament), fiber material (for example polyamide, aramid, HMW-PE) or in particular are taken into account. structure (for example, twisted threads of different realization and / or twist).

Thus, for example, the threads, which are first guided in the inner jacket, and the threads, which are first guided in the outer jacket, can have different colors. In this way the changes can be made colorimetrically recognizable from the outside. Length markings on the rope are also possible by color change. Threads with different properties, in particular colors, may also be provided within the yarn material of the inner jacket and / or the outer jacket.

In a further preferred embodiment, the core-jacketed rope according to the invention has yarns with different fineness. Thus, for example, the threads, which are guided first in the inner jacket, and the threads, which are guided first in the outer jacket, can have a different fineness (title). In particular, large differences in fineness in a yarn change lead to known irregularities in the string and to a different roughness.

Preferably, the core-jacketed rope according to the invention has additional fixed strands running in the longitudinal direction of the rope, which are individually braided in the hollow braid of the outer jacket. That is to say, in this case elements are provided in the external zone of the rope that carry additional tensile load, which are also connected by braiding closely with the threads of the jacket, in this case of the external jacket.

The jumper wires and / or the outer jacket fixed wires can be made of the same material as the core fixed wires.

Otherwise, for the rope according to the invention all materials familiar to the person skilled in the art can be selected.

Figure 1 schematically shows the structure of a preferred embodiment of the rope 1 according to the invention as well as its production by means of the possible arrangement in a round braider. With regard to the details of the apparatus of such a braider, reference is made to the relevant documents cited above in the state of the art. However, the production of a rope according to the invention, in which there is no connection between the inner and the outer jacket, can also take place in a two-stage process, in which the inner jacket is first braided with fixed braided wires and in a second stage the outer jacket.

The string 1 comprises a core 2 with several core strands (fixed strands) 21-28. An internal jacket 4 is located around these fixed threads. In addition, an external jacket 3 is provided.

The inner jacket 4 and the outer jacket 3 are formed in a manner known per se by braiding, the threads of the inner jacket as well as the threads of the outer jacket in each case being braided by means of braiding bobbins (not shown). In a known way, the braiding bobbins are arranged on driving wheels (not shown). For example, braiding bobbins may be provided for the production of the inner jacket 12, of which in each case 6 bobbins are guided in the Z direction and 6 bobbins in the S direction. The resulting bands of threads are indicated using solid lines or dotted lines. The analogous is applicable for the outer jacket. By way of example only, reference numbers 41 and 42 indicate two wires of the inner jacket as well as reference numbers 31 and 32 two wires of the outer jacket.

According to the invention, a part of the fixed core wires is individually braided in the hollow braid of the inner jacket. This is represented in figure 1 for the threads 21 to 26, which in each case are individually braided in the threads (by way of example: 41, 42) of the inner jacket. The threads 21 to 26 can be made up of one or several adjacent elements, such as, for example, twisted threads, which are supplied from perforations in the driving wheels.

Furthermore, in the embodiment shown in FIG. 1, the core has two fixed wires 27 and 28, which are located in the center of the core. Although these are naturally in close contact with the inner jacket threads and also the other core fixed threads during the manufacture of the cord, they are not bonded together nor twisted in the inner jacket.

Reference numbers 5 and 6 represent positions for thread changes or interlacing, in which, as explained above, according to a preferred variant of the present invention, threads are changed from the outer jacket to the inner jacket and to the Reverse and / or threads of the outer jacket and threads of the inner jacket are entangled with each other. This is achieved, as is known per se, by positioning two braiding bobbins (not shown) on a driving wheel (not shown).

According to the preferred embodiment of the present invention, they are now arranged in the wire change positions 5 and 6 jumper wires 51 and 61, specifically in such a way that they settle between the wires that change from outside to inside (and conversely ) or between the intertwining threads. From the point of view of the apparatus this is implemented by foreseeing a perforation in the driving wheel responsible for the thread change or interlacing.

Therefore, after the rope is manufactured, these jumper threads are tightly connected to the inner and outer jacket threads, thus ensuring an even better connection between these two elements and at the same time increasing the breaking load of rope.

The exact mode of thread change or interlacing now depends on the one hand on how many degrees the braiding bobbins are driven on drive wheels from thread change positions 5 and 6, as well as on whether the threads changing from each other or that they are intertwined of the outer jacket and the inner one are guided in the opposite direction or in the same direction.

Whether the threads that change between each other or that intertwine the outer and inner sleeve are guided in the opposite direction or in the same direction, depends on the direction of rotation of the drive wheels of the inner or outer sleeve: if the wheels drives are guided in the opposite direction, for the threads that change between each other or that are interwoven from the inner and outer jacket, guidance in the same direction and vice versa.

Some possible variants will be explained using Figures 2 to 7:

In them, in each case, the evolution of a thread (A), which is (firstly) in the outer jacket, with thick dotted lines, and the evolution of a thread (I), found (first) in the inner shirt, with thick striped line. The arrows in the area of the inner or outer jacket indicate in each case the direction of movement of the threads (A) and (I) on the braider, specifically clockwise or counterclockwise.

Figure 2 shows a “simple” yarn change from a yarn that comes from the outer jacket (A) and a yarn that comes from the inner jacket (I) in a variant, in which A and I are guided in the opposite direction . The wire A changes inwards and the wire I changes outwards, the wires being guided around the bridge wire B. Constructively this is achieved because the braiding bobbins carrying the wires A or I are guided on the drive wheel from the position of thread change 180 °.

Figure 3 shows an interlacing, that is to say the external thread A and the internal thread I are once guided around each other, but then continue to be guided again in the original position (that is to say A in the external jacket and I in the jacket internal). Constructively this is achieved because the braiding bobbins carrying threads A or I are guided on the drive wheel from the 360 ° thread change position. Jumper wire B lies in the middle of wires A and I and is therefore interwoven by them.

Figure 4 shows an interlacing with thread change, that is, a thread that comes from the outer jacket A and a thread that comes from the inner jacket I are once guided around each other and then change the position, that is to say the thread A changes to the inner jacket and thread I changes to the outer jacket. Constructively this is achieved because the braiding bobbins carrying the threads A or I are guided on the drive wheel from the thread change position 540 ° (360 ° additionally 180 °). Jumper wire B is again in the middle of wires A and I and is therefore interwoven by them.

Figures 5 to 7 show embodiments analogous to Figures 2 to 4, but with the wires coming from the outer jacket A and the wires coming from the inner jacket I being guided in the same direction. You can see the thread evolutions that differ from Figures 2 to 4, which can also be recognized in the finished rope. According to the invention, it is preferred that the threads that change between each other or that are interwoven of the outer jacket and the inner jacket are guided in the opposite direction.

In a similar way as in the case of the core core strands 21 to 26, in the region of the outer jacket also fixed strands can be provided in the longitudinal direction, which are braided by the strands of the external jacket. This is represented in Figure 1 only, for example, by reference numerals 71 and 72.

Claims (8)

1. Rope with core and jacket (1), comprising a textile core (2) with several fixed threads (21-28) that run completely in the longitudinal direction of the rope, an external jacket (3) that is in shape of a hollow braid and an inner jacket (4) that surrounds the core (2), which is in the form of a hollow braid, characterized in that a part of the fixed core strands (21-26) is individually braided in the hollow braid (41, 42) of the inner jacket (4) and because a part of the fixed threads (27, 28) of the core (2) is in the center of the core without union with each other, as well as without being braided in the inner shirt. 2. Core and jacket rope according to claim 1, characterized in that at certain points (5, 6) yarn changes are provided between threads (41, 42) of the inner jacket (4) and threads (31, 32) of the outer jacket and / or interlacing between threads (41, 42) of the inner jacket (4) and threads (31, 32) of the outer jacket (3). 3. Core and jacketed rope according to claim 2, characterized in that bridge threads (51, 61) running in the longitudinal direction of the rope are provided at points (5, 6) of the thread changes or interlacing. from which are guided the threads of the outer jacket or the inner jacket that change from inside to outside or from outside to inside. Core and jacketed rope according to claim 3, characterized in that the bridge wires (51, 61) are intertwined by the inner jacket wires and the outer jacket wires. 5. Core and jacketed rope according to one of claims 3 or 4, characterized in that the bridge wires (51, 61) are made of the same material as the core fixed wires (21-28). 6. Rope with core and jacket according to one of the preceding claims, characterized in that it has threads with different properties. Core and jacket rope according to one of the preceding claims, characterized in that it has additional fixed threads (71, 72), which are individually braided in the hollow braid (31, 32) of the outer jacket. Core and jacket rope according to one of claims 3 to 5, characterized in that the threads of the internal jacket and the external jacket that change from each other or interlock are guided in the opposite direction.